package edu.lambdateacher.expressions;

/*
 LambdaTeacher
 Copyright (C) 2000  Kim Mason
 Copyright (C) 2014  Vitalij Zadneprovskij

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */


/**
 * The class NumericalOperator represents a numerical operation (=,-,/,*). It is
 * a subclass of Expression.
 */
public class NumericalOperator extends Expression implements Cloneable {

	private NumericalOperatorType type; // the type of the operator (plus,
										// minus, mult, div)

	/**
	 * A simple constructor, which sets everything to null.
	 */
	public NumericalOperator() {
		super(); // implicit
		setType(NumericalOperatorType.PLUS);
	}

	/**
	 * A constructor which sets the type of this NumericalOperator.
	 */
	public NumericalOperator(NumericalOperatorType intype) {
		super();
		setType(intype);
	}

	public NumericalOperatorType getType() {
		return this.type;
	}

	public void setType(NumericalOperatorType intype) {
		this.type = intype;
	}

	// Override the clone method in superclass object
	public Object clone() {
		NumericalOperatorType newtype = this.getType();
		NumericalOperator toreturn = (NumericalOperator) super.clone();
		toreturn.setType(newtype);
		return toreturn;
	}

	/**
	 * unParse simply unparses the current NumericalOperator.
	 */
	public String stringRepresentation(boolean verbose) {
		return getType().getSymbol().toString();
	}
}
